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S44700 Stainless Steel vs. SAE-AISI P20 Steel

Both S44700 stainless steel and SAE-AISI P20 steel are iron alloys. They have 69% of their average alloy composition in common. There are 20 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown.

For each property being compared, the top bar is S44700 stainless steel and the bottom bar is SAE-AISI P20 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 82
73
Tensile Strength: Ultimate (UTS), MPa 600
540 to 1050

Thermal Properties

Latent Heat of Fusion, J/g 300
260
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Expansion, µm/m-K 11
12

Otherwise Unclassified Properties

Base Metal Price, % relative 18
2.8
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.6
1.6
Embodied Energy, MJ/kg 49
21
Embodied Water, L/kg 180
52

Common Calculations

PREN (Pitting Resistance) 42
2.6
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 21
19 to 37
Strength to Weight: Bending, points 20
19 to 29
Thermal Shock Resistance, points 19
18 to 35

Alloy Composition

Carbon (C), % 0 to 0.010
0.28 to 0.4
Chromium (Cr), % 28 to 30
0.4 to 2.0
Copper (Cu), % 0 to 0.15
0 to 0.25
Iron (Fe), % 64.9 to 68.5
95.2 to 98.5
Manganese (Mn), % 0 to 0.3
0.35 to 0.71
Molybdenum (Mo), % 3.5 to 4.2
0.3 to 0.55
Nickel (Ni), % 0 to 0.15
0
Nitrogen (N), % 0 to 0.020
0
Phosphorus (P), % 0 to 0.025
0 to 0.030
Silicon (Si), % 0 to 0.2
0.2 to 0.8
Sulfur (S), % 0 to 0.020
0 to 0.030